The addition of β-Hydroxy β-Methylbutyrate (HMB) to creatine monohydrate supplementation does not improve anthropometric and performance maintenance across a collegiate rugby season
Mangine GT, VanDusseldorp TA, Hester GM, Julian JM, Feito Y
Journal of the International Society of Sports Nutrition · 6 citations
How it was studied
- Design
- Randomized controlled trial (indexed by PubMed)
- Studied in
- People
- Main outcome
- Health markers and function
Who paid for it
- Funding
- Independent funding
- University or hospital
- Kennesaw State University
Based on 1 listed funder(s) and full-text disclosure statement.
Publication
- Published
- 2020-01-03 · J Int Soc Sports Nutr · vol. 17 · issue 1 · p. 28
- Publisher
- Springer Science+Business Media
- Cited
- 10 citations · more than 57% of similar papers · 0.5× the field average
- References
- 62 works
- Access
- Open access (journal) · CC-BY
- Research areas
- Muscle metabolism and nutrition · Sports Performance and Training · Exercise and Physiological Responses
- Keywords
- Medicine, Lean body mass, Repeated measures design, Bench press, Creatine Monohydrate, Creatine, Animal science, Anthropometry, Athletes, Placebo, Regimen, Physical therapy, Internal medicine, Endocrinology, Biology, Body weight
- MeSH
- humans, creatine, valerates, hydrocortisone, creatine kinase, cross-over studies, double-blind method, body composition, football, dietary supplements, male, athletic performance, young adult, sports nutritional physiological phenomena
5 authors
From US
- Gerald T. Mangine · correspondingKennesaw State University
- Trisha A. VanDusseldorpKennesaw State University
- Garrett M. HesterKennesaw State University
- J.M. Gutiérrez JuliánKennesaw State University
- Yuri FeitoKennesaw State University
Abstract
Background
Muscular damage sustained while playing rugby may hinder performance across a season. β-Hydroxy β-Methylbutyrate (HMB) may help attenuate muscle damage and maintain lean mass and performance. This study sought to determine the effect of combining HMB with creatine monohydrate supplementation on measures of stress and muscle damage, body composition, strength and sprinting kinetics throughout a rugby season.
Methods
This double-blind, cross-over investigation recruited 16 male collegiate rugby players to provide resting blood samples and complete assessments of body composition, strength and sprinting performance prior to their fall season (PREFALL). After testing, the athletes were matched for fat-free mass and assigned to consume one of two supplementation regimens for 6 weeks: 5 g HMB + 5 g creatine per day (HMB-Cr: 20.9 ± 1.1 years; 177 ± 2 cm; 88.4 ± 4.9 kg) or 5 g creatine + 5 g placebo per day (Cr: 21.4 ± 2.1 years; 179 ± 2 cm; 88.3 ± 4.9 kg). After 6 weeks (POSTFALL), PREFALL testing was repeated in 13 of the original 16 athletes before a 10-wk wash-out period. Athletes who returned for the spring season (n = 8) repeated all fall-season procedures and testing prior to (PRESPRING) and following (POSTSPRING) their 6-wk spring season, except they were assigned to the opposite supplementation regimen.
Results
Linear mixed models with repeated measures revealed group x time interactions (p - 1, p = 0.003) and impulse (~ 4.5 Nm·sec, p = 0.022) were observed in Cr at PRESPRING but not at POSTSPRING. Although significant interactions were found for cortisol concentrations, vastus lateralis pennation angle, and sprinting force, post-hoc analysis only revealed differences between fall and spring seasons. No other differences were observed.
Conclusions
The combination of HMB and creatine monohydrate supplementation does not provide a greater ergogenic benefit compared to creatine monohydrate supplementation alone. Body composition, strength, and sprinting ability did not change across the season with creatine monohydrate supplementation.
Abstract via Europe PMC. Copyright remains with the authors or publisher (CC BY).
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